Fastening element



May 2, 1933.

A. BRADLEY 1,906,527

FASTENING ELEMENT Filed Oct. 22, 1930 'lll/IA man@ i `Mayr 2; 1933i Amana' mnmyo'n; STERLING, rumors; Assioma fro#Noarnwlss'rmmv f i wmaconrmgor summe, .Immersa conrom'rroN-sor InnnfronsI o This invention has` to do with fastening elements such as nails, dowels, p1ns,-and the like,

and it is the principal. object of the invention to provide a nail So constructed as to have the 5 holdin characteristics of a much larger naily In carrying out my invention, I provide theI i nail or the like adjacentits point or wedge 15 with a substantiallyU-shaped or V-shaped depression, and when the nail is embedded in wood or the like, the latter, by reason of its inherent resilience fills the said depression so that, in order to remove the nail, it' 1s neces- Il) sary not only to overcome the friction between the wall of the nailand the surrounding wood or the like, but it is necessary further to forcek the latter out of said depression. Other objects and advantages of the pres- 2l entl invention will more fully appear from the followingfdetailed description taken in connection with the accompanying drawing, which illustratesa single embodiment there- 0f andin which 1 Figure 1 is an elevational view of la. nail embodying the invention.`

Figure 2 .is a sectional view showing the im roved nail embedded in wooden members.

' igure 3,l is a view taken at right angles to *thatr of Figure 2, Vthe nail beingy shown in elevation.

Figure 4 shows in elevation a modified form of the invention.

tional view of that portion of the nail em-y bolyingl the invention.

'gure 6 yis an enlarged cross-sectionall view taken in the plane VI-VI of Figure V1. Figure? i's a sectional view similar to Figure 3 showinganother modified form of the invention.

On the drawing:

In they accompanying sheetof drawing, `wherein the same element" is indicated throughout by the same reference character,

ya; portion 6 of thewo'od or'1thelikefwill'be Figure 5 is an enlarged fragmentary se'c- .1

'8 of the portions Tarea-lso engageabley with y Iv illustrate inFigu're 1,'a nail `embodying one yforni of my invcntionand comprising an impact end or head; '1 having'a ,shank 2 anda f point 3', the shank having, adjacent itsfpointy ;3,"a substantially Vishapednotch 4. If, de-A towardthe extremity 'of `the point'3. "It'will beapparent thatgfwhen the' nail'is embedded in 'wood 5 orthe like; as shown in Figure 2,

lodged'cin the notch 4behind the above :re-

` ferred yto-wall of thenotch, andit will, therefore, be a preciated that the 'combined `resistance o ered by the wood at' the point` 6 and elsewherewhere itl engagesthe nail, is equal toi i the resistance' to such removal occasioned upon the use f'a heavier, nail! having much greater surface area ofcontact with thewood i orthelikeL*V j t f1 yIf desired,fthe' nail'rnay be provided with l fone orl a'pluralifty of notches 4,' each lfunction- '75 ying `exactly thesaine las 'that above mentioned,

to yfurther increase. resistance "to removal of thenaillv j From a-man/unfa'cturers standpoint,thenail embodyingmy'invention is very practical and it has beenfound b "experiencefthata a 7-D commonifnailembo ying this invention vwill li'old equally as" well as BQI'IV S-Dcommon nailnot employin'gmy invention, fand that "there are 6() percent. more-nails of the'former varietyto the poundA than of thelatter. Thus the advantages vderived yin ythe use of `Iny"i'nvention are clearly apparent. r-

The notches or depressions formedf' in the nail. may be vcaused kby cutting 'into'the nail, althoughif desired, the I same may-beformed by merely depressing ythe .shank/fand thereby upsetting'v -the portion ofthe shank adjacent thedepression, ,as indicatedl at. The walls portions `9 of the wood: or lthey like to further resist removal of [the nail, yet the' parts-Taro so 'narrow, comparatively, `that they dojnot materiallyl obstruct entry'of the nail.

It wi'llbenotedin connection with `the im'- '10 proved form of nail devised by me that for all practical purposes there is no increase, but rather a decrease in the resistance oiered b the material, into which the nail is embedde to the progress of the nail therein, since the area of resistance is reduced by reason of the notches or depressions to a greater extent than it is increased by the upset portions 7. By locating the notches ordepressions adjacent the point of the shank, it will Vbe appreciated that in practice the shank will oer the same resistance to shear at the juncture of the pieces of material fastened by it, asis v offered by an ordinary nail.

Another form of the invention may be embodied in a. dowel pin construction as illustrated in Figure 7. It will be noted that the dowel pin 1()l hasan entering .wed or int 11 .at one end and adjacent eac en oppositely directed notches 12 are rovided.

Ridges or fins 13 may be included i desired- The pin 10 connects thepieces 14 and 15, and once the pin is embedded, as shown, the walls 16 0f the notches 12 interlock with. the materialat 17, thereby preventing separation of each piece from the pin. Y l

Now, of course, it is to be understood that although I have illustrated and described in detail the preferred form of my invention, the invention is not to be thus limited,.b\1t only insofar as defined by the scope and spirit 0f the appended claims. l. 4

I claim as my invention:

1. A dowel comprising a pin having `,an entering wedge at one end and a flat impact receiving portion atits other end, a` shoulder adjacent each end and facing the-opposite end, said portion and shoulders beingydisposed kradiall Within the confines ofthe surface of the body y ofthe pin, whereby said pin may be driven through a solid partv of onerpieee of material and into a. solid part of a second piece of material, said shoulders, when embeddedinsaidpieces, engaging the material of said pieces and thereby preventing separation thereof. y

2. A dowel (comprising a pin having an entering wedge at one end and a .flatim act receiving portion at its other end, a shou der adjacent each end and facin the opposite end, lsaid portion and shoul ers being` disposed radially within the confines of the surface/of the body of the pin, whereby said pin may be driven through a, solid `part of one` piece of material and into a solid part Vof a second piece of materiah'said shoulders, when embeddedin said pieces, engaging the material of said .pieces and thereby preventing separation thereof, and fins adjacent said shoulders and e, projecting slightly beyond said confines to cooperate with said shoulders in resisting separation of the pieces ,of material secured by the pin, said fins being narrow relative .to thepin to minimize resistance to entry of the pin into the material.

Looms? 3.- A headless nail having an entering wedge at one end and a flat impact receiving f solid' artof `a. second. iece ofmaterial, said shoul ers, when em ded in` said pieces, engaging the material thereof and thereby preventing separation of said pieces.

In testimony whereof I have hereunto subscribed m name at Sterling, Whiteside County, I linois. y N

' v,ALBERT BRADLEY. 

